Update CONTRIBUTING.md with default black line length

[garrison]

Summary

Black uses a line length of 88 by default, so this updates CONTRIBUTING.md accordingly. Alternatively, we could use a line length of 100; in this case, we would have to pass it as an argument to black in tox.ini.

Details and comments

[coveralls]

Pull Request Test Coverage Report for Build 2067414667

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 2067351188:	0.0%
Covered Lines:	11
Relevant Lines:	11

---

💛 - Coveralls

[caleb-johnson]

Summary

we could use a line length of 100

Details and comments

Do you have an opinion on it?

[garrison]

I don't have a strong opinion, but I think there is a good case for 100. The applications modules seem to use that as the limit, set in each repository's pyproject.toml. (This probably makes more sense than doing it in tox.ini, as I suggested in the top post.)

[garrison]

I'm going to merge this, since our goal is to keep the template repository in a near-perfect state at all times. I'll add the commit that reverts this change to #46, so that everything will be consistent then too if we decide to change the line length to 100 and merge it.

[coveralls]

Pull Request Test Coverage Report for Build 2067414667

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 2067351188:	0.0%
Covered Lines:	11
Relevant Lines:	11

---

💛 - Coveralls